Inverted-cone-shaped water tower construction technology

Abstract

The inverted-cone-shaped water tower construction technology comprises the following steps of foundation construction, construction of a supporting cylinder and a platform in the supporting cylinder, concrete pouring, prefabrication of a water tank, hoisting and welding of the water tank and equipment dismantling. The inverted-cone-shaped water tower is built through the construction technology, the erecting and disassembling period of the sliding lifting formwork and the lifting device is short, the pouring period of the supporting cylinder and the water tank is short, the construction efficiency is improved, and the construction period is greatly shortened. When the water tank is lifted, the water tank is lifted section by section through the lifting device, the water tank can be stably lifted in all directions at the same time, the water tank is prevented from deviating in the lifting process, and the mounting efficiency of the water tank is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, in particular to a construction process of an inverted cone-shaped water tower. Background Art

[0002] The inverted cone water tower is a relatively rare and unique water tower design. As the name suggests, it is shaped like an inverted cone (or pyramid), with a wide top and a narrow base. This design contrasts sharply with traditional water towers, which are typically cylindrical, spherical, or cylindrical with a slightly larger base. It offers the following advantages:

[0003] (1) Saving ground space: The small footprint of the base is one of its biggest advantages, making it particularly suitable for construction in urban environments where land is expensive or space is limited.

[0004] (2) Visual impact and landmark: Its unique appearance gives it a strong visual recognition and is often used as a symbol of urban landscape or specific areas.

[0005] (3) Potential aerodynamics: In some designs, a streamlined inverted cone shape may offer some optimization for wind loads (although a high center of gravity would offset some of the advantages).

[0006] (4) Utilization of upper space: The huge top structure can sometimes be combined with other functions (such as viewing platforms, restaurants, equipment rooms, etc.), but this will increase the structural complexity and cost.

[0007] The current construction of inverted cone-shaped water towers faces the following major challenges: high material consumption and long erection and dismantling cycles; each section requires curing and formwork removal before the upper levels can be constructed, resulting in a construction period of several months. Therefore, a construction process for inverted cone-shaped water towers with a shorter erection and dismantling cycle and a shorter construction period is needed. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the present invention provides an inverted cone water tower construction process, which has the advantages of short erection and dismantling period and construction period.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] A construction process for an inverted cone-shaped water tower comprises the following steps:

[0011] Step 1: Foundation construction: the foundation is constructed by manual excavation and cast-in-place concrete with wooden formwork. During construction, attention should be paid to the placement of fixed points in the center of the structure to control the assembly position of the slipform equipment and the verticality of the cylinder.

[0012] Step 2: Construction of the support tube and the platform inside the tube. The tube body is constructed using the sliding formwork process. First, the sliding equipment is assembled. After the sliding equipment is installed and all parts are fully inspected and qualified, construction can be carried out after acceptance, and concrete pouring can be carried out.

[0013] Step 3: Concrete pouring: Before pouring concrete, wet the concrete surface of the inner and outer formwork foundation layers with water, and first pour 5CM thick 1:2 cement mortar on the bottom layer, and then pour concrete in layers with a layer thickness of 40CM; when pouring, embed several positioning plates on the outer wall of the support tube, and the positioning plates are provided with positioning holes;

[0014] Step 4: Prefabrication of the water tank. After the slipform equipment is removed, the prefabricated water tank template is installed on the pier surrounding the support tube body on the ground. After the installation is completed, the holes in the template are tied with steel bars, and then the pouring of the water tank concrete is started. Pre-buried steel plates are set on the water tank, and anchor holes are provided on the pre-buried steel plates. At the same time, the steel bars at the bottom of the water tank extend to the outside of the water tank. After the pouring is completed, the water tank template is removed, and five layers of waterproofing are applied to the inner wall of the water tank and the outer wall is painted with decorative patterns.

[0015] Step 5: Hoisting the water tank: Install several brackets on the periphery of the support tube. The height of the brackets is greater than that of the support tube. Each bracket is equipped with a lifting device. The water tank is lifted into place section by section through the lifting device. Then weld the steel bars at the bottom of the water tank to the steel bars at the top of the support tube.

[0016] Step 6: Equipment dismantling. After the water tank is placed on the steel support, remove the lifting device.

[0017] Preferably, in step 2, the assembly order of the lifting equipment is: fixed derrick assembly, wind cable, base steel bar binding, internal and external formwork system installation, bracket and power hoist hanging, operating platform installation, and installation of hanger and safety net after lifting 1.5M.

[0018] Preferably, in step 3, the bottom concrete joint should be fully vibrated to ensure the density of the joint concrete; during construction, if the concrete pouring time is 1 hour, the formwork should be lifted 2 strokes before pouring the concrete in that section;

[0019] When the top of the outer formwork reaches the cylinder body elevation, the inner formwork and its lifting frame are removed, and the formwork is re-supported on the top of the cylinder, steel bars are tied and concrete is poured to complete the cylinder top platform.

[0020] Preferably, in step 4, after the water tank is poured, the inner formwork of the water tank is removed after about 1-3 days depending on the actual temperature conditions on site, and a full-house scaffolding can be erected inside the water tank at the corresponding position of the water tank top shell elevation, and the formwork is laid and the water tank top shell construction is completed according to the normal procedure; when the concrete strength of the top shell reaches 80%, the internal formwork, scaffolding and water tank outer formwork are removed, and then the inner wall of the water tank is waterproofed with five layers and the outer wall is decorated with patterns.

[0021] Preferably, the lifting device includes a jack installed on each bracket, all the jacks are connected to a lifting plate, multiple sets of winches are installed on the lifting plate, the lifting plate is provided with through holes matching the winches, the steel ropes on the winches pass through the through holes and are tied to the water tank, and are tied around the water tank through all the steel ropes.

[0022] Preferably, in step five, when lifting the water tank, the steel rope on the winch is tied to the water tank, and then the upper anchor rod and the lower anchor rod are installed on the embedded steel plate of the water tank, and then the oil pump is started to control the jack to lift a stroke, and then the upper anchor rod and the lower anchor rod are locked on the positioning plate of the support tube to fix the water tank on the support tube, and then the jack returns the oil to descend, the winch works, tightens the steel rope, and then loosens the upper anchor rod and the lower anchor rod, the jack continues to lift, and the water tank is lifted by the steel rope, and this cycle is repeated until the water tank is lifted into place.

[0023] Preferably, in step five, the actual lifting height of the water tank should exceed the design elevation of the support tube by 5-10 cm so that the steel bracket at the bottom of the lower ring beam of the water tank can be welded to the top of the support tube.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] By using this construction process to build an inverted cone-shaped water tower, the erection and dismantling period of the sliding formwork and lifting device is short, and the casting period of the support tube and water tank is short, which improves the construction efficiency and greatly shortens the construction period.

[0026] When lifting the water tank, it is lifted section by section through the lifting device, and the water tank can be lifted stably in all directions at the same time, preventing the water tank from shifting during lifting, thereby improving the installation efficiency of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a process flow chart of the present invention;

[0028] Figure 2 is a schematic diagram of a lifting device of the present invention;

[0029] In the figure: 1- bracket, 2- jack, 3- lifting plate, 4- support tube, 5- winch, 6- through hole, 7- steel rope, 8- water tank, 9- positioning plate, 10- embedded steel plate, 11- upper anchor rod, 12- lower anchor rod. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1 and Figure 2 , a construction process of an inverted cone water tower, comprising the following steps:

[0032] Step 1: Foundation construction: the foundation is constructed by manual excavation and cast-in-place concrete with wooden formwork. During construction, attention should be paid to the setting of fixed points in the center of the structure in order to control the assembly position of the slipform equipment and the verticality of the cylinder.

[0033] Step 2: Construction of support tube 4 and the platform inside the tube. The tube body is constructed using the sliding formwork process. First, the sliding equipment is assembled. The assembly sequence is as follows: assembling the fixed derrick, tying the wind cable, tying the base reinforcement, installing the internal and external formwork systems, hanging the bracket and power hoist, installing the operating platform, and installing the hanger and safety net after sliding 1.5 meters. After the sliding equipment is installed and all parts are fully inspected and qualified, construction can be carried out after acceptance, and concrete pouring can begin.

[0034] Step 3: Concrete pouring. Before pouring concrete, wet the concrete surface of the foundation layer of the inner and outer formwork with water, and first pour 5CM thick 1:2 cement mortar on the bottom layer, and then pour the concrete in layers with a layer thickness of 40CM. The bottom concrete joints should be fully vibrated to ensure the density of the joint concrete; during construction, if the concrete pouring time is 1 hour, the formwork should be lifted 2 strokes before pouring the concrete in that section. When the top of the outer formwork reaches the elevation of the cylinder body, remove the inner formwork and its lifting frame, and then support the formwork on the top of the cylinder, tie the steel bars and pour the concrete to complete the cylinder top platform. During pouring, a number of positioning plates 9 are embedded in the outer wall of the support cylinder, and the positioning plates 9 are provided with positioning holes.

[0035] Step 4: Prefabricate the water tank 8. After the slipform equipment is removed, the prefabricated water tank formwork is installed on the ground around the support tube body. After installation, the holes in the formwork are tied with steel bars, and then the concrete pouring of the water tank begins. Pre-embedded steel plates 10 are set on the water tank, and the pre-embedded steel plates 10 are provided with anchor holes. At the same time, the steel bars at the bottom of the water tank extend to the outside of the water tank. After the water tank is poured, the inner formwork of the water tank will be removed after about 1-3 days depending on the actual temperature conditions on site. The scaffolding can be erected inside the water tank at the corresponding position of the water tank top shell elevation, and the formwork is laid. The water tank top shell construction is completed according to the normal procedure. When the concrete strength of the top shell reaches 80%, the inner formwork, scaffolding and water tank outer formwork are removed, and then the inner wall of the water tank is waterproofed with five layers and the outer wall is painted with decorative patterns.

[0036] Step 5: Hoisting the water tank. Install several brackets 1 on the periphery of the support tube. The height of the bracket 1 is greater than the height of the support tube 4. A lifting device is installed on each bracket 1. The lifting device includes a jack 2 installed on each bracket 1. All jacks 2 are connected to a lifting plate 3. The lifting plate 3 is located above the support tube 4. Multiple groups of winches 5 are installed on the lifting plate 3. The lifting plate 3 is provided with a through hole 6 matching the winch. The steel rope 7 on the winch 5 passes through the through hole and is tied to the water tank 8. All the steel ropes 7 are tied around the water tank 8. When lifting the water tank 8, the steel rope on the winch is tied to the water tank 8. Then, the upper anchor rod 11 and the lower anchor rod 12 are installed on the embedded steel plate 10 of the water tank 8. Then, the oil pump is started, and the upper anchor rod 11 and the lower anchor rod 12 are controlled to lift one stroke. Then, the upper anchor rod 11 and the lower anchor rod 12 are locked to the positioning plate 9 of the support tube 4, so that the water tank 8 is fixed to the support tube 4. Then, the jack 2 returns the oil and descends. The winch 5 is operated to tighten the steel rope 7. Then, the upper anchor rod 11 and the lower anchor rod 12 are loosened. The jack 2 continues to lift, and the steel rope is used to lift the water tank. This cycle continues until the water tank is lifted into place. The actual lifting height of the water tank should exceed the design elevation of the support tube by 5-10 cm to allow the steel bracket at the bottom of the water tank lower ring beam to be welded to the top of the support tube.

[0037] Step 6: Dismantle the equipment. After the water tank is placed on the steel support, remove the lifting device.

[0038] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A construction process for an inverted cone-shaped water tower, characterized in that: The following steps are involved: Step 1: Foundation construction: the foundation is constructed by manual excavation and cast-in-place concrete with wooden formwork. During construction, attention should be paid to the placement of fixed points in the center of the structure to control the assembly position of the slipform equipment and the verticality of the cylinder. Step 2: Construction of the support tube and the platform inside the tube. The tube body is constructed using the sliding formwork process. First, the sliding equipment is assembled. After the sliding equipment is installed and all parts are fully inspected and qualified, construction can be carried out after acceptance, and concrete pouring can be carried out. Step 3: Concrete pouring: Before pouring concrete, wet the concrete surface of the inner and outer formwork foundation layers with water, and first pour 5CM thick 1:2 cement mortar on the bottom layer, and then pour concrete in layers with a layer thickness of 40CM; when pouring, embed several positioning plates on the outer wall of the support tube, and the positioning plates are provided with positioning holes; Step 4: Prefabrication of the water tank. After the slipform equipment is removed, the prefabricated water tank template is installed on the pier surrounding the support tube body on the ground. After the installation is completed, the holes in the template are tied with steel bars, and then the pouring of the water tank concrete is started. Pre-buried steel plates are set on the water tank, and anchor holes are provided on the pre-buried steel plates. At the same time, the steel bars at the bottom of the water tank extend to the outside of the water tank. After the pouring is completed, the water tank template is removed, and five layers of waterproofing are applied to the inner wall of the water tank and the outer wall is painted with decorative patterns. Step 5: Hoisting the water tank: Install several brackets on the periphery of the support tube. The height of the brackets is greater than that of the support tube. Each bracket is equipped with a lifting device. The water tank is lifted into place section by section through the lifting device. Then weld the steel bars at the bottom of the water tank to the steel bars at the top of the support tube. Step 6: Equipment dismantling. After the water tank is placed on the steel support, remove the lifting device.

2. The inverted cone water tower construction process according to claim 1, characterized in that: In step 2, the assembly order of the lifting equipment is: fixed derrick assembly, wind cable, base reinforcement binding, internal and external formwork system installation, bracket and power hoist hanging, operating platform installation, and installation of hanger and safety net after lifting 1.5M.

3. The inverted cone water tower construction process according to claim 2, characterized in that: In step 3, the bottom concrete joints should be fully vibrated to ensure the density of the joint concrete; during construction, if the concrete pouring time is 1 hour, the formwork should be lifted 2 strokes before pouring the concrete in that section; When the top of the outer formwork reaches the cylinder body elevation, the inner formwork and its lifting frame are removed, and the formwork is re-supported on the top of the cylinder, steel bars are tied and concrete is poured to complete the cylinder top platform.

4. The inverted cone water tower construction process according to claim 3, characterized in that: In step 4, after the water tank is poured, the inner formwork of the water tank will be removed after about 1-3 days depending on the actual temperature conditions on site. The scaffolding can be erected inside the water tank at the corresponding position of the water tank top shell elevation, the formwork can be laid and the water tank top shell construction can be completed according to the normal procedure; when the concrete strength of the top shell reaches 80%, the internal formwork, scaffolding and water tank outer formwork are removed, and then the five layers of waterproofing on the inner wall of the water tank and the decorative painting on the outer wall are applied.

5. The inverted cone water tower construction process according to claim 4, characterized in that: The lifting device comprises a jack (2) mounted on each bracket (1), a lifting plate (3) connected to each jack (2), the lifting plate (3) being located above the support tube (4), a plurality of winches (5) being mounted on the lifting plate (3), a through hole (6) matching the winch being provided on the lifting plate (3), a steel rope (7) on the winch (5) passing through the through hole and then being tied to a water tank (8), and then being tied to the periphery of the water tank (8) through all the steel ropes (7).

6. The inverted cone water tower construction process according to claim 5, characterized in that: In step five, when lifting the water tank, tie the steel rope on the winch to the water tank, then install the upper anchor rod and the lower anchor rod on the embedded steel plate of the water tank, then start the oil pump, control the jack to lift a stroke, and then lock the upper anchor rod and the lower anchor rod on the positioning plate of the support tube to fix the water tank on the support tube, then the jack returns the oil and descends, the winch works, tightens the steel rope, and then loosens the upper anchor rod and the lower anchor rod, the jack continues to lift, and lifts the water tank through the steel rope, and repeats this cycle until the water tank is lifted into place.

7. The inverted cone water tower construction process according to claim 6, characterized in that: In step five, the actual lifting height of the water tank should exceed the design elevation of the support tube by 5-10 cm so that the steel bracket at the bottom of the lower ring beam of the water tank can be welded to the top of the support tube.

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